Mmm, beacause Starfleet Command is going to believe a cadet -- an Orion cadet. An Orion cadet whose job doesn't involve monitoring temporal anomalies.

[ that wasn't an insult to his request, more a statement of fact. the federation wasn't perfect, and she'd be kidding herself if she said they didn't have good reason to be suspicious of an orion. hell, orions were suspicious of other orions. ]